JPH0550176U - Ventilated type disc rotor - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a ventilated type disk rotor in which cracks due to thermal deformation do not occur on both sliding surfaces of an outer and an inner. [Structure] Outer and inner sliding surface disc 1
An inner end portion 14 of a rib 13 connecting the first and the second portions 12 extends inward from inner peripheral end surfaces 15 and 16 of both discs and is connected to an outer peripheral surface 20 of a cylindrical portion 19 which constitutes a mounting portion to a vehicle. And the reinforcing thickening portion 13 is provided on the end portion 14 of the rib 13.
Formed A.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a ventilated type disc rotor used in a vehicle brake system.

[0002]

[Prior Art]

 As disclosed in JP-A-2-253020, a conventional ventilated type disc rotor for a vehicle such as an automobile is constructed by pressing a brake pad of the disc rotor 1 as shown in FIGS. 11 and 12 of this document. A disc-shaped inner sliding surface disc 2 and an outer sliding surface disc 3 for braking are provided so as to face each other, and a cooling effect of heat generation on the sliding surface due to pressing of the brake pad during braking is provided. In order to raise the height of the discs, a gap for air flow is provided between the discs 2 and 3, and ribs 4 and 4 connecting the discs 2 and 3 are radially formed in the gap, and adjacent ribs are formed. Slots 5 and 5 serving as passages for cooling air are provided between the slots 4 and 4.

A cylindrical portion 6 for attaching to a vehicle is continuously provided on the axial center side of the sliding surface disc 3 of the outer, and a bottom portion which is an outer end of the cylindrical portion 6 has a flange portion for attaching to a vehicle. The mounting surface 7 has a central hole 8, mounting holes 9, 9 and auxiliary holes 10, 10 for removing the disc rotor 1 from the vehicle, which are continuous with the outer peripheral edge of the barrel mounting surface 7.

The above-mentioned conventional ventilated type disc rotor is used for braking the vehicle, at high speed rotation, and when the braking frequency is increased within a short time, the inner sliding surface disc 2 and the outer disc High heat is generated in the sliding surface disk 3, and the sliding surface disk 3 undergoes thermal deformation around the cylindrical portion 6 as a dotted line as shown in FIG.

When this thermal deformation occurs, a large internal stress is generated particularly on the sliding surface disk 3 side of the outer, and as shown in FIGS. 14 and 15, radial cracks C ₁ are formed on both disks 2 and 3. , C ₂ are likely to occur, and if the above-mentioned thermal deformation is caused, the contact (contact) between the brake pad and the disc rotor 1 becomes unstable, the brake effectiveness varies, and brake judder is likely to occur. There is a problem.

[0006]

[Problems to be solved by the device]

 In the present invention, even if the outer and inner sliding surface discs are heated to a high temperature due to a severe braking action, there is no risk of thermal deformation as in the conventional case, so that no crack is generated and cooling efficiency is good. It is an object to provide a ventilated type disc rotor that can maintain good braking performance during any driving operation.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that a plurality of disc-shaped outer and inner sliding surfaces of a ventilated type disc rotor are connected to each other through a plurality of coupling surfaces which face each other. The ribs are formed radially with respect to the axial center, and the inner ends of the ribs on the inner side of the disc extend radially inward from the inner peripheral end faces of the outer and inner sliding faces of the disc, and are attached to the vehicle. A cylindrical portion that is continuous with the outer peripheral edge, a reinforcing thickening portion is formed at the end portion of an appropriate number of ribs in the continuous portion, and the inner peripheral end surface of the outer sliding surface disc, and The structure is such that a gap is formed between the outer peripheral surface of the cylindrical portion.

According to the second aspect of the present invention, the reinforcing thickening portion is a bridging portion that connects the adjacent gaps of the end portions of the appropriate number of ribs.

Further, in the invention of claim 3, the reinforcing thickening portion is a widening portion of a portion near each end of each rib.

According to the fourth aspect of the invention, the reinforcing thickening portion is composed of the widened portion near the end portion of each rib and the bridge portion that connects the adjacent gaps of the widened portions of the appropriate number of ribs.

[0011]

[Action]

 According to the invention of claim 1, the outer and inner sliding surface discs are only connected by the ribs, and are not directly continuous with the cylindrical portion continuous to the outer peripheral edge of the mounting surface to the vehicle. Since a gap is formed between the outer peripheral surface of the cylindrical portion and the inner peripheral end surface of the outer sliding surface disc, the cooling effect is improved, and the continuous installation with the cylindrical portion is performed in the axial direction. Of the end portions that are thick and continuous, a reinforcement thickening portion is formed at an appropriate number of end portions, and the ribs at a temperature lower than that of the sliding surface disk are used for high temperature sliding. Since the moving surface disc is not directly connected to the cylindrical part, thermal deformation is small, internal stress of the sliding surface disc of the outer cutter is reduced, cracks are not generated, and contact with the brake pad is stable. Increased durability.

In the reinforcing thickening portion of the invention of claim 2, the adjacent gaps at the end portions of the ribs are continuous with the bridging portion, and in the reinforcing thickening portion of the invention of claim 3, The end portion is widened, and the reinforcing thickening portion of the invention of claim 4 is one in which the adjacent gap of the widened end portion of the rib is continuous by a bridge portion, both of which are disc rotor castings. Sometimes it can be easily molded, and the reinforcing effect can be enhanced without increasing the number of processing steps.

[0013]

【Example】

 1 to 4 show an example of a ventilated type disk rotor 1 in which the inventions of claims 1 and 2 are implemented together, and the sliding surface disk 11 of the outer and the sliding surface of the inner relative to each other. The face disk 12 is integrally connected by a large number of ribs 13 formed radially with respect to the axis.

The end portion 14 of the rib 13 on the inner side of the disk extends radially inward from the inner peripheral end surfaces 15 and 16 of the outer and inner sliding surface disks 11 and 12, and is a ventilated type disk rotor 1. Is integrally connected to a cylindrical portion 19 which is connected to an outer peripheral edge 18 of a mounting surface 17 for mounting the vehicle on a vehicle.

As a result, a gap 21 is formed between the inner peripheral end surface 15 of the outer sliding surface disk 11 and the outer peripheral surface 20 of the cylindrical portion 19.

In the illustrated example, every other adjacent gap 14A between the end portions 14 of the adjacent ribs 13 is continuous with the bridge portion 22 that is the reinforcement thickening portion 13A.

The mounting surface 17 is provided with a central hole 8, a mounting hole 9, and an auxiliary hole 10 for removal as in the conventional product.

As shown in FIGS. 1 and 3, the end portion 14 of the rib 13 is continuous with the cylindrical portion 19 so that the cylindrical portion is formed between the outer and inner sliding surface discs 11 and 12. Of the cooling air passages 23, 24 formed at the lower end of 19, the air passage 24 is narrowed by the thickness of the bridging portion 22 at the end portion 14 of the rib 13, but this bridging portion 22 is reinforced. The continuous portion of the end portion 14 of the rib 13 and the cylindrical portion 19 is reinforced by the formation of the thickness increasing portion 13A.

FIG. 4 is an enlarged cross-sectional view of a continuous portion of the end portion 14 of the rib 13 and the cylindrical portion 19. The thickened portion 19A is formed on the outer peripheral surface of the lower end of the cylindrical portion 19, and this thickened portion 19A is formed. The connecting portion 25 between the flesh portion 19A and the upper surface 13B of the rib 13 has a curved surface with a large R, and the increased thickness portion 19A and the connecting portion 25 also reinforce the continuous portion of the rib 13 and the cylindrical portion 19. .

In the embodiment shown in FIG. 1, the bridge portions 22 are formed in every other adjacent gap 14A, but the bridge portions 22 are formed in every two adjacent gaps 14A as shown in FIG. Alternatively, as shown in FIG. 6, they may be formed in all the adjacent gaps 14A, and the formation position of the bridging portion 22 is appropriately selected depending on the application.

FIG. 7 shows an embodiment of the invention of claim 3, wherein the reinforcing thickening portion 13 A formed at the end portion 14 of the rib 13 serves as the widening portion 26 of the end portion 14 of the rib 13. The widened portion 26 is formed over the entire height of the end portion 14 of the rib 13.

In the embodiment shown in FIGS. 1 to 7, as clearly shown in FIGS. 1 and 4, the end portion 14 of the rib 13 occupies the same position as the inner peripheral surface 27 of the cylindrical portion 19. However, as shown in FIG. 8, this end portion 14 may be located radially outside with respect to the inner peripheral surface 27 of the cylindrical portion 19 with a space W therebetween.

Due to the presence of the gap W, intermittent cutting due to the end portions 14 of the ribs 13 existing in the same plane can be avoided when finishing the cutting of the inner peripheral surface 27.

FIG. 9 shows an embodiment of the invention of claim 4, wherein every other adjacent gap 14 A of the end portion 14 of the rib 13 having the widened portion 26 is made continuous by the bridging portion 22, and Although the space W is provided between the end portion 14 and the inner peripheral surface 27 of the cylindrical portion 19, the bridging portion 22 may be formed in the structure shown in FIG. 5 or 6. Of course.

In FIG. 10, a bridging portion 28, which is a reinforcing thickening portion 13 A, is formed in a gap 21 between the inner peripheral end surface 15 of the outer sliding surface disk 11 and the outer peripheral surface 20 of the cylindrical portion 19. However, the cooling air passage 23 is prevented from being narrowed.

[0026]

[Effect of the device]

 According to the invention of claim 1, the outer and inner sliding surface discs are only connected by the ribs, and are not directly connected to the cylindrical portion continuous to the outer peripheral edge of the mounting surface to the vehicle. Since a gap is formed between the outer peripheral surface of the cylindrical portion and the inner peripheral end surface of the outer sliding surface disk, the cooling effect is improved.

The outer and inner sliding surface discs and the cylindrical portion are connected to each other through a rib, and the rib has a large axial thickness, and the end is continuous. Since the reinforcement thickening is formed on an appropriate number of the parts, the thermal deformation of the connecting part between the cylindrical part and the rib is small, and the sliding surface disk and the rib and the cylindrical part are The internal stress in the continuous parts is also small, cracks do not occur in these parts, contact with the brake pad is stable, and durability is enhanced.

According to the inventions of claims 2 to 4, in addition to the above effects, it is possible to simultaneously form the disk rotor at the time of casting, and to increase the reinforcing effect without increasing the processing man-hours and the difficulty of casting. Have a positive effect.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the line AA in FIG. 2 showing an example of an embodiment of the invention of claims 1 and 2.

FIG. 2 is a front view of what is shown in FIG.

FIG. 3 is a cross-sectional view showing a part of a cross section taken along line BB in FIG.

FIG. 4 is an enlarged view of part of what is shown in FIG.

FIG. 5 is a partially omitted front view showing a part of another example of implementation of the invention of claims 1 and 2 as a cross section.

FIG. 6 is a partially omitted front view showing a part of another embodiment of the invention of claims 1 and 2 as a cross section.

FIG. 7 is a front view showing an example of an embodiment of the invention of claim 3 as a partial cross section.

FIG. 8 is a front view showing a part of another embodiment of the invention of claims 1 and 2 as a cross section.

FIG. 9 is a front view showing a part of an example of implementation of the invention of claim 4 as a cross section.

FIG. 10 is a longitudinal sectional view of a further different embodiment of the invention of claims 1 and 2;

FIG. 11 is a front view showing a part of a conventional product as a cross section.

12 is a vertical cross-sectional view of what is shown in FIG.

FIG. 13 is a vertical cross-sectional view of only a main part showing a heat-deformed state of a conventional product.

FIG. 14 is an explanatory diagram of a main part showing a crack generation state of a conventional inner sliding surface disk.

FIG. 15 is an explanatory diagram of a main part showing a crack generation state of a conventional outer sliding surface disk.

[Explanation of symbols]

 1 Ventilated type disk rotor 11 Outer sliding surface disk 12 Inner sliding surface disk 13 Rib 14 End part 15, 16 Inner peripheral end surface 17 Mounting surface 18 Outer peripheral surface 19 Cylindrical part 20 Outer peripheral surface 21 Gap 22 Cross-linking part 26 Widening Part 13A Reinforcement thickening part 14A Adjacent gap

Claims (4)

[Scope of utility model registration request] 1. A ventilated type in which a large number of ribs, which connect between facing surfaces of two sliding surface discs of two disk-shaped outer and inner surfaces facing each other, are radially formed with respect to an axial center. In the disc rotor, the end portion of the rib on the inner side of the disc extends radially inward from the inner peripheral end faces of the outer and inner sliding face discs and is continuous with the outer peripheral edge of the attachment surface to the vehicle. The ribs are continuously provided on the end portion of the appropriate number of ribs in the continuous portion,
A ventilated type disk rotor in which a reinforcing thickening portion is formed and a gap is formed between the inner peripheral end surface of the outer sliding surface disc and the outer peripheral surface of the cylindrical portion. 2. A bridge structure in which a reinforcing thickening portion at an end portion of a rib, which is continuously provided in a cylindrical portion continuous to an outer peripheral edge of a mounting surface to a vehicle, connects adjacent gaps at an end portion of a proper number of ribs. The ventilated type disk rotor according to claim 1, which is defined as a part. 3. A reinforcing thickening portion at an end portion of a rib that is continuously provided in a cylindrical portion that is continuous with an outer peripheral edge of a mounting surface to a vehicle is a widening portion at a portion near each end portion of each rib. The ventilated type disk rotor according to claim 1. 4. A reinforcing thickening portion at an end portion of a rib, which is connected to a cylindrical portion continuous to an outer peripheral edge of a mounting surface to a vehicle, has a widened portion near each end portion of each rib, and an appropriate number. 2. A bridging portion that connects the adjacent gaps of the widened portions of the ribs to each other.
Ventilated type disc rotor described.